Plug cock



Feb. 12 1924.

H. BRUNNER PLUG COCK Filed July 27 1920 3 Sheets-Sheet 1 3 mmntoz F 3 7 b v 7 V l W! w wiw .11

fi ans Zrwnnar 1 than,

. H. BRUNNER Feb. 12 1924.

PLUG COCK 1920 3 Sheets-Sheet 2 Filed July 27 3 vwanlfoz Feb. 12 1924. 1,483,508

H. BRUNNERY PLUG COCK Filed July 27 1920 s Sheets-Sheet s 31 wuam'toz %;n.s zr 1 $14 Gwynne/q Patented Feb. 12, .1924.

HANS BRUNNER, OF OUDER AMSTEL, NETHERLANDS.

PLUG

Application filed July 27,

To all whom it may concern Be it known that I, HANS BRUNNER, citizen of Switzerland, residing at Ouder Amstel, VVeespervaart 184e, Netherlands, have invented certain new and useful Improvements in Plug Cocks, of which the following is a specification.

This invention relates to an adjustable plug valve for steam, water and gas under pressure and has for its object to provide improved means for permitting the renewal of the packing while the valve is under pressure and for preventing jamming of the plug in the valve casing and leaking of the packing. The main disadvantages of the valves hitherto designed and used are, that when a renewal of the packing becomes necessary the pressure to which the valve may be exposed must be removed from the valve and its piping-system.

Besides if the packing-gland is screwed or pressed too hard on the packing, the ,plug will be driven too tightly into the casing, which may cause jamming and posisible damaging of the plug when turning it I With the above object in view the in vention consists in the details of construc tion and in the arrangement and combination of parts as will be hereinafter fully described and specifically claimed.

In describing the invention in detail reference will be had to the accompanying drawings wherein like characters of reference denote corresponding parts and in which:

Fig. 1 is a vertical sectional view of one forF'm of the invention.1 l d l i 2isa view art in an an art ho i'izontal secti n ori line A-B, I ig. Fig. 3 is a side elevation of the plug;

. Fig. 4 is a top view thereof;

Fig. 5 is a side elevation of a sleeve or bushing which is employed;

Fig. 6 is a top view thereof;

Fig. 7 is a vertical section showing. a modification;

Fig. 8 is a top view thereof;

Fig. 9 i a vertical section of a further modification Fig. 10 is a top Fig. 11 is a side elevation view thereof;

of the plug represented in Fig. 9.

Fig. 12 is a top view thereof. In Figs. 1, 2, 3, 4, 5, and 6, 1 is the valve casing, 18 the plug valve and 13 a caplike to the plug 18 and will not the position of said plug,

COCK.

1920. Serial No. 400,520.

sleeve or bushing, adapted to be fitted over the stem 6 of the valve 18 and fastened theretoby means of a key 14.

.The sleeve 13 is provided at its lower end with a flange, which rests on an annular shoulder or seat 2 formed in the upper portion of the valve casing a slight distance above the valve, said flange being encircled by a ring 12, also resting on the seat 2, and being held in placeon said seat by an externally screw-threaded ring 3 which is screwed into the upper part of the casing on top of the ring 12; the height and the daimeter of both rings being such that the flange may be easily turned in the space formed by said rings. The cap 15 of the sleeve 13 is made square to permit the operating lever or handle to be fitted thereon, and is formed with a threaded bore, through which passes the screw 9, the latter having a head 8 which fits into a slot 7 in the top of the stem 6 and is turnable therein. The bolt 9 is provided with a nut 11 and a uare end 10 for fixing and adjusting the position of the valve.

4 is the gland, which fits around the sleeve 13. The space between the gland 4 and the ring 3 serves for the packing.

With the arrangement hereinbefore described it is obvious that after having brought the sleeve 13 and the rings 12 and 3 into their proper position, and having fixed and adjusted the position of the plug 18 in the casing 1' by turning the screw 9 and screwing the nut 11 against the cap 15 of the sleeve 13, the packing may at any time be taken out or put into the space between the ring 3 and the gland 4, as this space is situated outside the sphere of action of the pressure. Besides when screwing down the gland 4 against the packing, the pressure will be taken up by the ring 3, so that this pressure cannot be transmitted cause the plug to become jammed.

As the described arrangement allows a very accurate adjustment of the plug, and as when once adjusted, cannot be altered, the chance of. leaking is a very small one, even in case of a renewal of the packing, when the packing is liable to contract and leak. Figs.-7 and 8 show a modification of the arrangement for adjusting and fixing the position of the plug.

Instead of utilizing the cap 15, the screw 9 and the key 14 for attaching the sleeve to the valve stem 6, the said stem 6 is ex- I tended beyond the sleeve 13 and its upper part is provided with screw-threads 16 for screwing it into the sleeve, the upper part of which is also threaded. The top part of the stem is made square to enable the attachment of a handle or lever for adjusting the position of the plug 18, while the nut 11 is used for maintaining this position after adjustment; for turning the plug 18 in the casing 1, the sleeve may be provided with recesses 17, adapted to engage a suitable instrument.

The arrangements hereinbefore described may be used for valves which are only accessible from the top; in case they are also accessible from the bottom, the construction shown in Figs. 9, 10, 11 and 12 is preferably used, as being considerably simpler and cheaper to construct; in such case, the sleeve 13, the key 14 and the screw-threaded extension 16 may be omitted.

Instead of the upper end of the valve stem being provided with the slot 7, this slot is cut in the bottom of the plug itself and the screw 9 fits into the bottom of the plug; the position of its nut 11 being as shown in Fig. 9.

The various parts as disclosed in Figs. 9, 10, 11 and 12 are assembled by first placing the screw bolt 9 in the slot 7 of valve 18 and then inserting these two elements into the casing 1 whereby the square end 10 will pass through the bore of the casing until the threads of the bolt reach the threads of the bore. The plug is then forced into the casing and by means of the bolt 9 and the lock nut 11 secured in place. The parts 3, 4 and 5 are now inserted which completes the assembly.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed I declare that what I claim is:

A valve structure comprising a casing having a fixed bottom provided with a threaded bore and an inlet and an outlet for fluid; a. tapered plug valve rotatably mounted in the casing and provided at the lower end with a slot; a screw bolt rotatable in and disconnectable from said slot for longitudinally adjusting and holding the valve, said screw bolt being threaded directly into the fixed bottom of the casing and having at the lower end a square portion which is longer than the threaded bore in said bottom and passes without turning through and projects outwardly through the threaded bore in said casing; and a lock nut on said screw bolt for securing said screw bolt against longitudinal movement.

In testimony whereof I afiix my signature.

HANS BRUNNER. 

